Exporting all addresses (mailboxes, aliases and distribution lists) is a vital tool if you have a backup MX and only want it to accept email for valid recipients. One reason for that is to stop spammers who simply use a dictionary of common names to generate recipient email addresses which would flood a backup MX with undeliverable email. Some anti-spam providers (e.g. Postini) have automatic provisioning processes for making this possible.

Exporting all addresses (mailboxes, aliases and distribution lists) is a vital tool if you have a backup MX and only want it to accept email for valid recipients. One reason for that is to stop spammers who simply use a dictionary of common names to generate recipient email addresses which would flood a backup MX with undeliverable email. Some anti-spam providers (e.g. Postini) have automatic provisioning processes for making this possible.

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Exporting all addresses (mailboxes, aliases and distribution lists) is a vital tool if you have a backup MX and only want it to accept email for valid recipients. One reason for that is to stop spammers who simply use a dictionary of common names to generate recipient email addresses which would flood a backup MX with undeliverable email. Some anti-spam providers (e.g. Postini) have automatic provisioning processes for making this possible.